import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '@/components/Login.vue'
import Home from '@/components/Home.vue'

Vue.use(VueRouter);

const routes = [
  {path:"/",redirect:"/login"},
  {path: "/login",name: "Login",component: Login},
  {path: "/home",component: Home},
];

const router = new VueRouter({
  routes
});
//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to 将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  //  next（）放行 next（'/login'）强制跳转

  if(to.path==='/login') return next()
  //获取token
  const tokenStr =window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router;